First, grease a 5x7-inch pan with melted butter/oil

Then line it with parchment paper, leaving an overhang on all sides (this makes it easy to take the fudge out of the pan when set).

Cut chocolate into smaller pieces. (or you can use the same amount of chocolate chips instead)

Then place a heavy-bottomed pan on low heat and add the condensed milk and chopped chocolate to the pan.

Keep stirring for 4-5 minutes or until the chocolate completely melts and becomes smooth.

Pour the mixture into the prepared pan and smooth it out using a spatula.

Refrigerate for 3-4 hours or more until set.

Then cut them into 8 slices or more as per your preference.

Now enjoy your delicious 2 ingredients, rich and chocolaty chocolate fudge!